Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "tooth tissue" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Condition of mineralized tooth tissue in a population of 15-year-old adolescents living in a region of Ukraine with slightly exceeded fluorine concentration in the water
Autorzy:
Bachanek, T.
Hendzel, B.
Wolańska, E.
Samborski, D.
Jarosz, Z.
Pitura, K.M.
Dzida, K.
Podymniak, M.
Tymczyna-Borowicz, B.
Niewczas, A.
Shibynskyy, V.
Zimenkovsky, A.
Powiązania:
https://bibliotekanauki.pl/articles/2085118.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Tematy:
tooth tissue
fluorine
chemical composition of water
Opis:
Introduction. Fluorine is a common element in nature; however, the difference between a beneficial dose and a toxic dose for the organisms is small. The main source of fluoride for humans is water in addition to food. Objective. The aim of this study was to estimate the degree of severity of pathological changes, namely, caries or fluorosis, in the mineralized tooth tissue of 15-year-old adolescents with respect to their hygienic and nutritional habits, and the content of fluorine in drinking water, soil and plant products. Materials and method. 100 adolescents aged 15 from schools in Sosniłka, L’viv region, were examined. The condition of mineralized tooth tissue was evaluated by the caries severity, expressed by the mean number D3MFT, caries frequency and value of the SIC index. Fluorine in plant material and soil were determined according to the PN-G-04543:1982 standard, and water according to the PN-EN ISO 10304 – 1: 2009+ AC: 2012 standard. Results. Severity of caries disease expressed by the D3MFT number in the examined group of 15-year-olds was 3.39; in the group of girls – 3.08, and in the group of boys – 3.76. In the examined group, the average number of teeth with fluorosis was 7.59. Value of the SIC index among the examined population of students (n-31) was 6.26: 5.89 (n-18) for girls and 7.31 (n-13) for boys. Fluorine concentration in the water was 0.78 – 1.25(mg·dm-3). In the soil, it also did not vary across the sampled areas and amounted, on average, to 176 mg·dm-3. The biggest fluorine content noted in the dry mass of beetroots was 3.50 (mg F· kg), and the lowest – 3.34 (mg F· kg). Conclusions. Close to optimal fluorine content lowers caries severity and frequency of fluorosis. Optimal fluorine content in drinking water and food does not require additional diet supplementation
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 4; 623-629
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulations of thermal processes in tooth proceeding during cold pulp vitality testing
Autorzy:
Ciesielski, M.
Mochnacki, B.
Siedlecki, J.
Powiązania:
https://bibliotekanauki.pl/articles/306384.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
przepływ ciepła
modelowanie matematyczne
proces termiczny
stomatologia
bio-heat transfer
mathematical modeling
thermal processes
tooth tissue
dental pulp testing
Opis:
Purpose: This paper deals with the mathematical modeling of the thermal processes occurring in the tooth, during a very brief contact (a few seconds) with a very cold liquid on a part of the tooth crown. In this way one can simulate a heat transfer in tooth proceeding during a dental diagnostic test - pulp vitality testing. The impact of rapid ambient thermal changes acting on the tooth can cause toothache. Methods: The mathematical model: a system of partial differential equations with initialboundary conditions (the axially-symmetrical problem) and their numerical solutions using the control volume method is discussed. Results: Simulation results of the kinetics of the temperature changes inside the tooth are presented. The example of the control volume mesh (using the Voronoi polygons) well describing the shape of a molar tooth is given. Conclusions: The simulation results (the temperature distribution in the tooth at any moment of the simulation time and the kinetics of temperature variation at the points of the considered tooth domain) can help dentists in the selection of an appropriate method of treatment.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 3; 33-41
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies